Honest Honeywell HPA304 Review 2025: Pros, Cons, Features & Performance

garagetested.com editorial team

Garage Tested Editorial Team

(Updated March 13, 2025)
ℹ About Our Rankings
ℹ Advertising Disclosure

200+ bought in past month

Honeywell AllergenPlus HEPA Air Purifier, Airborne Allergen Reducer for Extra…
  • EXTRA LARGE ROOM AIR PURIFIER – Honeywell HPA304 HEPA Air Purifier helps provide fresher,…
  • REDUCES WILDFIRE SMOKE AND ODORS: Wildfire smoke can impact the air quality where you…
  • HELPS REDUCE ALLERGENS – This HEPA air purifier has 3 air cleaning levels including Turbo…
  • EFFECTIVE AIR CLEANING AND CIRCULATION – The Honeywell HPA304 Air Purifier filters and…

Highlights

  • Filters particles as small as 0.3 microns, good for removing dust and allergens.
  • Covers a large area up to 465 square feet, suitable for big rooms.
  • Includes a HEPA filter air purifier without the need for batteries or assembly.
  • Features button control for easy operation.
  • Comes in white color to match any home decor.
  • Weighs 17 pounds, making it sturdy yet movable.

The Honeywell AllergenPlus is a game-changer for extra-large rooms, ensuring the air you breathe is clean and fresh. Picture coming home after a long day to an environment free from dust, pollen, and pet dander – all thanks to this powerhouse equipped with a Certified HEPA Filter that traps up to 99.97% of these irritants. Ideal for those wildfire seasons or if you have pets at home, it’s designed to make your indoor space more comfortable and healthier.

Not only does it boast powerful filtration capabilities, but its energy efficiency also earns it an ENERGY STAR label. You’ll notice fewer allergens floating around as it circulates air in your room up to 4.8 times an hour without ramping up the electricity bill. Plus, with features like touch controls, filter change indicators, and a dimmer option for its control panel—it blends seamlessly into your life. Whether dealing with seasonal allergies or just striving for cleaner indoor air quality, this purifier meets needs without fuss or muss.

Features

  • The Honeywell HPA304 HEPA Air Purifier captures up to 99.97% of tiny airborne particles including dust, pollen, and smoke, thanks to its Certified Honeywell HEPA Filter. Imagine breathing easier in your home without sneezing from pet dander or coughing because of dust.
  • Efficient air circulation is a breeze with this device—it filters and circulates air in rooms as large as 465 square feet nearly five times an hour. No more stale smells or stuffy air when you’re trying to relax at home.
  • Energy Star certified, meaning it meets strict energy efficiency guidelines set by the U.S. EPA. You get cleaner air without watching your electric bill skyrocket—a smart choice for both your wallet and the environment.
  • It includes three cleaning levels plus a Turbo Clean setting for those days when you need extra power against unwanted odors or allergens—think of it as a boost button for fresh air on demand.
  • Quiet operation with easy-to-use touch controls makes this purifier user-friendly; no wrestling with complicated settings or being disturbed by loud noises while it works. Plus, features like the auto-off timer and filter change indicator add convenience, letting you set it and forget it until maintenance is needed.
  • Designed specifically to tackle wildfire smoke particles which can travel far and wide affecting indoor air quality even if fires are not nearby—keeping your home’s atmosphere clean during seasonally poor outdoor conditions becomes less of a worry.

Pros

  • Uses only Genuine Honeywell filters for top performance, avoiding lesser quality of compatible replacements.
  • Part of the Allergen Plus series, meets strict ENERGY STAR energy efficiency guidelines.
  • Filters and circulates air in rooms up to 465 square feet, around 4.8 times an hour.
  • Captures dust, pollen, pet dander, and smoke — ideal during wildfire season.
  • Cleans a large area quickly: up to 2250 sq ft in one hour for extra-large room coverage.

Use Cases

Pet Owners, Breathe Easy

Pet dander floats around more than we think. The Honeywell HPA304 HEPA Air Purifier turns this around in homes with pets. Imagine sitting in your living room, free from the sneezes and itchy eyes often caused by pet fluff. This purifier captures up to 99.97% of microscopic allergens including pet dander. It means both you and your furry friends can enjoy cleaner air.

Combat Wildfire Smoke

Wildfire smoke doesn’t care about boundaries; it invades homes miles away, reducing indoor air quality. Enter the Honeywell HPA304 with its high efficiency particulate air (HEPA) filter designed to tackle smoke particles head-on. Residents in wildfire-prone areas now have a shield against invasive smoke—keeping indoor spaces clear and breathable, no matter what’s happening outside.

Allergy Relief in Extra Large Rooms

For those with allergies, spring is tough — pollen seems to invade every corner of large spaces making it hard to escape the sniffles. But here’s relief: The Honeywell HPA304 HEPA Air Purifier can handle extra-large rooms up to 465 sq ft., circulating clean air nearly five times an hour. That means significant reductions in airborne allergens like pollen and mold spores throughout even spacious areas of your home or office, providing a safe haven for allergy sufferers.

Honeywell AllergenPlus HEPA Air Purifier, Airborne Allergen Reducer for Extra…
  • EXTRA LARGE ROOM AIR PURIFIER – Honeywell HPA304 HEPA Air Purifier helps provide fresher,…
  • REDUCES WILDFIRE SMOKE AND ODORS: Wildfire smoke can impact the air quality where you…
  • HELPS REDUCE ALLERGENS – This HEPA air purifier has 3 air cleaning levels including Turbo…
  • EFFECTIVE AIR CLEANING AND CIRCULATION – The Honeywell HPA304 Air Purifier filters and…

FAQs

1. What makes the Honeywell HPA304 HEPA Air Purifier effective for large rooms?

The Honeywell HPA304 uses true HEPA filters and a powerful air circulation system, designed specifically for extra-large rooms. It captures up to 99.97% of microscopic airborne allergens, dust mite debris, mold spores, pet dander, and smoke particles.

2. How does this air purifier improve indoor air quality?

Thanks to its activated carbon pre-filter, it not only traps larger particles like lint but also reduces odors and VOCs (volatile organic compounds). This feature, combined with its high CADR (Clean Air Delivery Rate), significantly boosts indoor air quality.

3. Can I leave the Honeywell HPA304 running all day?

Absolutely! With features like an auto-off timer and energy star label, it’s built for efficiency. You can run it throughout the day without worrying about high electricity bills or safety issues.

4. Does this model tell me when to change filters?

Yes! The filter change indicator alerts you when it’s time for a replacement – no guesswork needed. And changing filters is straightforward, ensuring your air stays clean with minimal effort.

5. What unique features does this purifier offer for user comfort?

It has several thoughtful additions: a turbo setting for quick purification, a dimmer option to reduce light while you sleep, and quiet operation that doesn’t disturb your peace – perfect for maintaining clean rooms without noise disruption.

Upgrade Your Air Quality Now

The Honeywell HPA304 HEPA Air Purifier is perfect for someone with a big space, looking to fight off allergens like pollen, pet dander, and smoke – especially during wildfire season. If you value breathing clean air in your home or office and want an energy-efficient solution, this air purifier is the answer. Don’t wait; transform your living space’s air quality today.

Garage Tested air purifier rankings are based on our internal yee-haw garage testing, actual customer feedback, and the analysis by our editorial team. We have done your homework on these products.

Purifiers Were Garage Tested & Passed:

Independent Home Testing
Airflow Testing
Noise Testing
Durability Test
Air Quality Improvement
Editor’s Choice

PuroAir 240 Air Purifier

Best Air Purifier on the market for performance, quality and value.